Improvement in gas-extinguishers for street-lamps



v mom. Gas- Exti'nguish'erfur Street-Lamps.

Patented June 22; 1875.

INTI

manna;

THE G RAPHC CORHOTD-LITHJQ 14] PARK PLACE,N.Y-

UNITE STATES PATENT, FFIQE,

LEWIS BOORE, OF BUFFALO, NEW YORK.

I IMPROVEMENT IN GAS-EXTINGUISHERS FOR STREET-LAMPS.

Specification forming part of Letters Patent No. 164,71 1, datid June22, 1875; application filed May 28, 1875.

To all whom "it may concern: Y

Be it known that I, LEWIS BOORE, of Buffalo, in the county of Erie andState of New York, have invented a new and useful Improvement in Devicefor Shutting oh the Gas from Street-Lamp-Post Burners, of which thefollowing is a specification:

Figure 1 is a vertical section of my improvedvdevice. Fig. 2 is avertical section, showing a slight modification of the same.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved device forshutting off the gas from street-lamp-post burners, and thus putting outthe lights, by altering the pressure at the gasworks, and which shall besimple in construction, and reliable'in operation.

The invention consists in the combination with each other of the case,provided with a grooved and recessed bottom, and an inlettube, the coverprovided with outwardly and inwardly projecting flanges around a holeformed through its center, the inverted cup provided with anoutlet-tube, and the burnertip, whether said tip be-attached directly tothe outlet-tube, or to an exterior burner; in the combination of theinclined ring-flange with the outlet-tube of the device, and with theouter flange of the cover; and in the combination of the lock-catch andits bracket with the cover and withthe inclined flange formed upon theoutlet-tube of the device, as hereinafter fully described.

A is a metal case, upon the top of which is screwed a cover, B. In thebottom of the case A is formed a ring groove to receive the edge of theinverted cup G. The cup (3 is secured to a tube, D, which passes downthrough the center of the top of the cup 0, and its lower end enters acavity in the center of the bottom of the case A. The lower end of thetube' D is three-sixteenths of an inch, more or less,higher than thelower edge of the cup (J, so that the end of the tube D may be raisedout of the mercury placed in the bottom of the case A while the edge ofthe cup ('1 is still immersed. The ring groove and the central cavity inthe bottom of the case A are intended to lessen the quantity of mercuryrequired. to effect a perfect seal. The upper part of the tube D passesup through and slides longi' tudinally in a hole in the cover B of thecase A and to its upper end is attached a burnertip, E. In the upper endof the tube D is placed a plug, 01, having a hole formed through itsmaller than the capacity of the burner-tip. Upon the inner side of thecover B, around the opening through said cover, is formed, aring-flange, b to prevent the mercury from escaping through the saidhole, should the case A B be turned upon its side, or even bottomupward. Upon the upper side of the cover B, around the hole through saidcover, is formed a ring-flange, D to protect thesaid hole, and serve asa guide to the tube D to keep it vertical as it moves up and down. Tothe tube D, above the top of the flange W, is attached a cap ordownwardly projecting flange F, to cover the upper edge of the flange band prevent the entrance of dust.

In the modification shown in Fig. 2, the tube D terminates at about thetop of the flange b and an ordinary gas-burner, G, is screwed upon thesaid flange 11 In this case the hole through the plug d, inserted in theupper end of the tube D, must be smaller than the capacity of theburner-tip, to prevent the pressure upon the outer and inner surfaces ofthe cup 0 from becoming gradually equalized, and thus allowing the saidcup 0 to settle down and put out the light. This could not happen withthe construction first described.

The cup 0 may have Weights H placed upon it to gage it to resist anydesired pressure.

The gas enters through a tube, I, which passes in through the bottom ofthe case, and projects into the cavity of the cup 0, so far above saidbottom that the mercury cannot flow out through it.

The tube I may be formed as a solid part of the case A, if desired, andits lower end should be so formed that it may be conveniently connectedwith the gas-pipe of the lamp-post.

With this construction, when the pressure upon the gas is increased atthe gas-house above the amount to resist which the cup is weighted, thesaid cup will be forced upward, raising the lower end of the tube Dabove the mercury, and allowing the gas to pass through said tube to theburner. The tube D is held down against the increased pressure by thecatch J, which is pivoted to a small bracket,

K, attached to the cover B. As the cup 0 and tube D descend upon thedecrease of the pressure, the edge of the flange F strikes the catch J,pushes it back, and passes below it. The said catch immediately swingsforward over said flange, preventing the rise of said cup and tube untilthe said catch has been drawn back. When the time for lighting thestreet-lamps approaches, the pressure upon the gas is increased to thedesired point at the gas-house. Then as the lamp-lighter cornesto eachlamp-post he pushes back the catch J, and as the tube and cup rise withthe prcssnre he lights the escaping gas. When the time for putting outthe lights arrives, the

attendant at the gas-house reduces the pressure to the proper point, andall the lights in the street-lamps are put out at the same time.

Another advantage of this invention is, that no gas can be lit orallowed to remain lighted during daylight, or at any other time, exceptwhen the gas company desire it, and properly adjust the pressure at thegas-works.

Having thus described my invention, 1

claim as new and desire to secure by Letters Patent- 1. The combinationof the case A, provided with a grooved and recessed bottom, and aninlet-pipe, I, the cover B, provided with outwardly and inwardlyprojecting flanges b 11 around a hole formed through its center, the

' inverted cup 0, provided with an outlet-tube,

-D of the device, substantially as herein shown and described.

LEWIS Boone.

Witnesses:

J. E. HAAS, M. J. FAUX.

